How do you reset the check engine light for a 2004 Honda city?
Easiest way to "Reset" the Check Engine Light. Use an OBD2
reader. You can purchase one yourself($100.00 or so) or you can
just go to a car parts store ex: Auto Zone, O' Rileys Auto Parts,
Napa, etc. They will assist you or let you use the OBD2 reader
yourself. Hook up the OBD2 reader to the designated hookup, make
sure your car is not running. Turn the key to ignition, but DO NOT
start. Power the OBD2 reader ON and the OBD2 reader should
automatically diagnos your problem, tell you why the Check Engine
Light is on and also you have the option of "Resetting" or to
"Erase" the check engine light code. CODE, meaning, your car sends
a certain code for certain problems and the OBD2 reader, reads that
code and tells you what part(s) need to be replaced or fixed. Hope
this was helpful-Danny(15yr Mechanic)